CN103297106A - Code division multiple access multiple-antenna open-loop diversity transmission method and base station - Google Patents
Code division multiple access multiple-antenna open-loop diversity transmission method and base station Download PDFInfo
- Publication number
- CN103297106A CN103297106A CN2012100455101A CN201210045510A CN103297106A CN 103297106 A CN103297106 A CN 103297106A CN 2012100455101 A CN2012100455101 A CN 2012100455101A CN 201210045510 A CN201210045510 A CN 201210045510A CN 103297106 A CN103297106 A CN 103297106A
- Authority
- CN
- China
- Prior art keywords
- antennas
- antenna
- pilot
- data
- pilot tone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a code division multiple access multiple-antenna open-loop diversity transmission method and system. According to the method, only one or two pilot frequencies are used, one or two antennas in four antennas are used for transmitting the pilot frequencies and data, other antennas do not transmit the pilot frequencies and data. Antenna selection in the four antennas are achieved in a round-robin mode, signal transmission through four-antenna diversity shows handling capacity gain brought by the multiple-antenna diversity technology, and an old version UE supporting only two-antenna diversity is also compatible.
Description
Technical field
The present invention relates to many antennas open loop diversity and send, particularly 4 antenna open loop diversity sending method and base stations in a kind of code division multiple access system.
Background technology
Along with development of Communication Technique, increasing new technology emerges, and WCDMA (Wideband CodeDivision Multiple Access, Wideband Code Division Multiple Access (WCDMA)) system is present scope of application third generation wireless communication system the most widely.For how the WCDMA system being carried out evolution is the most important research work of wireless communication field to adapt to the user to the demand of high speed uplink and downlink data transmission.From R5, a series of important techniques are introduced WCDMA to improve up and downlink transmission data rate: HSDPA (HighSpeed Downlink Packet Access, the high speed downlink packet access), HSUPA (High SpeedUplink Packet Access, the High Speed Uplink Packet access), MIMO (Multiple-InputMultiple-Output, multiple-input and multiple-output), 64QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation).Through the research of several versions, the efficiency of transmission that improves wireless channel has been reached a bottleneck.For the challenge of the demand that satisfies the user and other technology of reply, the WCDMA system considers many antennas (greater than 2) OLTD (Open Loop Transmit Diversity, Open-Loop Transmit Diversity) is introduced down link, with further raising cell throughout.At present in 3GPP TS25.214 V10.4.0,2 antenna open loop diversities support in agreement, but do not support more multi-antenna diversity scheme, for example 4 antennas.
In the prior art, stipulated the open loop diversity scheme of 2 antennas in the agreement, can be corresponding to QPSK, 16QAM and 64QAM modulation system.Fig. 1-3 is respectively 2 antenna open loop diversity schemes of QPSK modulation system, 2 antenna open loop diversity schemes of 16QAM modulation system, 2 antenna open loop diversity schemes of 64QAM modulation system.Among Fig. 1-3, the data sending order is the left back right side of elder generation.About the definition of conj (b_i), if b_i represents is the real number value data, conj (b_i)=-b_i.Be to comprise 2 system data { 0,1} and 0 power signal DTX are at 3 interior Value Datas, if b_i=0, then conj (b_i)=1 if b_i represents; If b_i=1, then conj (b_i)=0; If b_i=DTX, then conj (b_i)=b_i.
The coding that satisfies this transmission rule of Fig. 1-3 is called STTD (Space Time TransmitDiversity, space-time emission diversity) coding.This coding can allow the communication system of 2 antenna transmit diversities obtain maximum diversity gain under transmitter is not known the scene of channel.
Among Fig. 1, because be the QPSK modulation, therefore 2 bits constitute 1 QPSK symbol.Corresponding diagram 2 is that 4 bits constitute 1 16QAM symbol.Corresponding diagram 3 is that 6 bits constitute 1 64QAM symbol.
The shortcoming of prior art scheme is as follows:
1. the open loop diversity scheme only is applicable to 2 antennas.
2. the supported maximum throughput of open loop diversity scheme is limited.
3. every antenna of open loop diversity scheme all needs to consume a variable length quadrature OVSF (OrthogonalVariable Spreading Factor, Orthogonal Variable Spreading Factor OVSF) sign indicating number or a quadrature pattern.
Summary of the invention
At the problems referred to above, the object of the present invention is to provide many antennas of code division multiple access open loop diversity sending method and base station.
On the one hand, the invention provides a kind of many antennas of code division multiple access open loop diversity sending method, described method is applicable to that code division multiple access 4 antenna open loop diversities send, and described method comprises:
Determine 2 pilot tones, wherein said 2 pilot tones are orthogonal guide frequency;
Adopt the repeating query mode, in described 4 antennas, select 2 antennas to send described 2 pilot tones, wherein 1 antenna is launched 1 pilot tone and data in selecteed described 2 antennas, and 1 antenna is launched another pilot tone and data in addition, and non-selected antenna is not launched pilot tone and data.
On the other hand, the invention provides a kind of many antennas of code division multiple access open loop diversity sending method, described method is applicable to that code division multiple access 4 antenna open loop diversities send, described method comprises: adopt 1 pilot tone, adopt the repeating query mode to select 1 antenna to launch described pilot tone and data in 4 antennas, non-selected antenna is not launched pilot tone and data.
On the one hand, the invention provides a kind of CDMA base again, described base station comprises 4 open loop diversity transmitting antennas, also comprises: determination module, for the pilot tone of determining 2 quadratures; The repeating query module, described repeating query module is selected 2 antennas for employing repeating query mode at 4 antennas, and wherein 1 antenna is launched 1 pilot tone and data, and 1 antenna is launched other 1 pilot tone and data in addition; Non-selected antenna is not launched pilot tone and data.
Another aspect, the invention provides a kind of CDMA base, 1 pilot tone is adopted in described base station, described base station comprises 4 open loop diversity transmitting antennas and repeating query module, described repeating query module is used for adopting the repeating query mode to select 1 antenna to launch pilot tone and data at 4 antennas, and non-selected antenna is not launched pilot tone and data.
The scheme of 4 antenna open loop diversities emission pilot tone of the present invention and data, compare the emission of 2 antenna open loop diversities and obtain bigger diversity gain, and support the compatibility of 2 antenna open loop diversity old edition UE, and can not increase existing pilot code resource and pilot power expense:
Obtain the diversity gain of 4 antennas and only use 1 pilot tone or 2 pilot tones, do not increase the quantity of pilot tone, pilot power can not increase.
Obtain the diversity gain of 4 antennas and only use the pattern of 1 spreading code and 2 mutually orthogonals, the perhaps spreading code of 2 mutually orthogonals and 1 pattern do not increase the quantity of spreading code and pattern, save spreading code and pattern resource.
Description of drawings
Fig. 1 is 2 antenna open loop diversity schemes of available technology adopting QPSK modulation system;
Fig. 2 is 2 antenna open loop diversity schemes of available technology adopting 16QAM modulation system;
Fig. 3 is 2 antenna open loop diversity schemes of available technology adopting 64QAM modulation system;
Fig. 4 is a kind of data format schematic diagram of 4 antenna open loop diversity schemes of the embodiment of the invention;
Fig. 5 is the flow chart of the open loop diversity sending method of the embodiment of the invention one;
Fig. 6 is the flow chart of the open loop diversity sending method of the embodiment of the invention two;
Fig. 7 is the architecture of base station schematic diagram of the embodiment of the invention three;
Fig. 8 is 4 antenna open loop diversity scheme application scenarios figure of the embodiment of the invention four;
Fig. 9 is the pilot transmission mode schematic diagram of the embodiment of the invention one;
Figure 10 is the another pilot transmission mode schematic diagram of the embodiment of the invention one;
Figure 11 is the pilot transmission mode schematic diagram of the embodiment of the invention two.
Embodiment
Transmitting of WCDMA system comprises pilot tone and data.The signal emission of 4 antenna diversities also needs the compatible old edition UE (User Equippment, user terminal) that only supports 2 antenna diversities except needs embody the throughput gain that the multi-antenna diversity technology is brought.The invention provides the launch scenario of several descending 4 antenna open loop diversities.
The embodiment of the invention one provides a kind of many antennas of code division multiple access open loop diversity sending method, it is characterized in that, described method is applicable to that code division multiple access 4 antenna open loop diversities send, and described method comprises:
Determine 2 pilot tones, wherein said 2 pilot tones are orthogonal guide frequency;
Adopt the repeating query mode, in described 4 antennas, select 2 antennas to send described 2 pilot tones, wherein 1 antenna is launched 1 pilot tone and data in selecteed described 2 antennas, and 1 antenna is launched another pilot tone and data in addition, and non-selected antenna is not launched pilot tone and data.
In present embodiment one, adopt the mode of 4 antenna repeating queries, improved diversity gain, thereby increased throughput.And when adopting 4 antenna repeating queries only with 2 antennas emission pilot tones, therefore have 2 antennas not consume orthogonal guide frequency all the time, improved the utilance of pilot resources.
Fig. 5 is the flow chart of the open loop diversity sending method of above-described embodiment.
Above-mentioned definite 2 pilot tones comprise:
Determine 2 pilot frequency designs and 1 spreading code, described 2 pilot frequency designs are become described 2 pilot tones through behind described 1 spreading code respectively, wherein said 2 pilot frequency designs are the quadrature pattern; Perhaps determine 1 pilot frequency design and 2 spreading codes, described 1 pilot frequency design is become described 2 pilot tones through behind described 2 spreading codes respectively, wherein said 2 spreading codes are orthogonal intersection.
Above-mentioned pilot frequency design is by {+1, the symbol sebolic addressing with certain-length that-1} forms constitutes.Described 2 pilot frequency designs refer to that for the quadrature pattern inner product of the symbol sebolic addressing of described 2 pilot frequency designs is 0.Illustrate, establish pilot frequency design 1 and be symbol sebolic addressing (1,1), pilot frequency design 2 is symbol sebolic addressing (1 ,-1), and described pilot frequency design 1 is orthogonal pilot pattern with pilot frequency design 2.
Above-mentioned spreading code is by {+1, the symbol sebolic addressing with certain-length that-1} forms constitutes.The length of spreading code is defined as SF (Spreading factor, spreading factor).Described 2 spreading codes are that the inner product of the orthogonal intersection symbol sebolic addressing that refers to described 2 spreading codes is 0.Illustrate, establish SF and be 2 spreading code 1 and be symbol sebolic addressing (1,1), SF is that 2 spreading code 2 is symbol sebolic addressing (1 ,-1), and described spreading code 1 is orthogonal intersection with spreading code 2.
Above-mentioned pilot frequency design is as follows through the process prescription that becomes pilot tone behind the spreading code: each symbol in the pilot frequency design is that the spreading code of SF expands to SF symbol by length.Be exemplified below, the symbol sebolic addressing of pilot frequency design 1 is (1 ,-1), and SF is that the symbol sebolic addressing of 2 spreading code 1 is (1,1), and then the pilot tone of pilot frequency design 1 after by spreading code 1 spread spectrum is symbol sebolic addressing (1,1 ,-1 ,-1).
The round robin cycle of described repeating query mode is the transmission duration TTI of a data transmission block, is the positive integer of the transmission duration of each symbol in the data transmission block doubly.
Select 2 antennas in described 4 antennas, comprising:
According to the CQI that reports (Channel Quality Indication, channel quality indication), in described 4 antennas, select 2 the highest described 2 pilot tones of transmission of CQI value;
If exist many antennas to have the highest identical CQI value, in described many antennas, select 2 at random.
The form that is noted that the data in the embodiment of the invention one preferably is space-time emission diversity STTD coded system.Also can take other data format, for example, referring to Fig. 4, the data on two antennas of emission data are the copy of initial data, and the content of emission is all consistent with initial data with the time sequencing of emission.
The embodiment of the invention two provides a kind of many antennas of code division multiple access open loop diversity sending method, it is characterized in that, described method is applicable to that code division multiple access 4 antenna open loop diversities send, described method comprises: adopt 1 pilot tone, adopt the repeating query mode to select 1 antenna to launch described pilot tone and data in 4 antennas, non-selected antenna is not launched pilot tone and data.
In present embodiment two, adopt the mode of 4 antenna repeating queries, improved diversity gain, thereby increased throughput.And when adopting 4 antenna repeating queries only with 1 antenna emission pilot tone, therefore have 3 antennas not consume orthogonal guide frequency all the time, improved the utilance of pilot resources.
Fig. 6 is the flow chart of the open loop diversity sending method of above-described embodiment.
The round robin cycle of described repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
The described selection of selecting 1 antenna in 4 antennas is according to being the CQI value that reports: select that the highest root antenna of CQI value, as if existing a plurality of antennas to have the situation of the highest identical CQI value, then select 1 at random in described a plurality of antennas.
The embodiment of the invention three provides a kind of CDMA base, the pilot tone of 2 quadratures is determined in described base station, it is characterized in that: described base station comprises 4 open loop diversity transmitting antennas and a repeating query module, described repeating query module is used for adopting the repeating query mode to select 2 antennas at 4 antennas, wherein 1 antenna is launched 1 pilot tone and data, 1 antenna is launched other 1 pilot tone and data in addition, and non-selected antenna is not launched pilot tone and data.
In present embodiment three, adopt the mode of 4 antenna repeating queries, improved diversity gain, thereby increased throughput.And when adopting 4 antenna repeating queries only with 2 antennas emission pilot tones, therefore have 2 antennas not consume orthogonal guide frequency all the time, improved the utilance of pilot resources.
Fig. 7 is the architecture of base station schematic diagram of above-described embodiment.
2 pilot tones are determined in described base station, comprising: determine 2 pilot frequency designs and 1 spreading code, described 2 pilot frequency designs are become described 2 pilot tones through behind described 1 spreading code respectively, wherein said 2 pilot frequency designs are the quadrature pattern; Perhaps determine 1 pilot frequency design and 2 spreading codes, described 1 pilot frequency design is become described 2 pilot tones through behind described 2 spreading codes respectively, wherein said 2 spreading codes are orthogonal intersection.
The round robin cycle of described repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
In described 4 antennas, select 2 antennas, comprising:
According to the channel quality indicator (CQI) that reports, in described 4 antennas, select 2 the highest described 2 pilot tones of transmission of CQI value; If exist many antennas to have the highest identical CQI value, in described many antennas, select 2 at random.
The form that is noted that the data in the embodiment of the invention three preferably is space-time emission diversity STTD coded system.Also can take other data format, for example, referring to Fig. 4, the data on two antennas of emission data are the copy of initial data, and the content of emission is all consistent with initial data with the time sequencing of emission.
The embodiment of the invention four provides a kind of CDMA base, 1 pilot tone is adopted in described base station, it is characterized in that: described base station comprises 4 open loop diversity transmitting antennas and repeating query module, described repeating query module is used for adopting the repeating query mode to select 1 antenna to launch pilot tone and data at 4 antennas, and non-selected antenna is not launched pilot tone and data.
In present embodiment four, adopt the mode of 4 antenna repeating queries, improved diversity gain, thereby increased throughput.And when adopting 4 antenna repeating queries only with 1 antenna emission pilot tone, therefore have 3 antennas not consume orthogonal guide frequency all the time, improved the utilance of pilot resources.
The architecture of base station schematic diagram of present embodiment is equally referring to Fig. 7.
The round robin cycle of described repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
Selecting the selection foundation of 1 antenna in 4 antennas is the CQI value that reports: select that the highest root antenna of CQI value, if exist a plurality of antennas to have the situation of the highest identical CQI value, then select 1 at random in described a plurality of antennas.
Fig. 8 is 4 antenna open loop diversity scheme application scenarios figure of the embodiment of the invention.
Figure 8 illustrates base station and user terminal in the code division multiple access system, described user terminal is portable terminal preferably, and base station and user terminal all are configured to open loop transmit diversity modes.
The base station has 4 Open-Loop Transmit Diversity antennas, and 1 of selection or 2 antennas are followed 1 or 2 pilot tones respectively from these 4 antennas.In pilot design, if used 2 pilot frequency designs, then 2 patterns need quadrature.
WCDMA adopts variable length orthogonal code ovsf code.Embodiment all gives an example with ovsf code.
Fig. 9 is the pilot transmission mode schematic diagram of the embodiment of the invention one.
In Fig. 9, adopt 1 ovsf code and first pilot frequency design to constitute first pilot tone.Adopt with 1 ovsf code with one with first pilot frequency design mutually second pilot frequency design of quadrature constitute second pilot tone.
In Fig. 9, g is adjustable gain factor.According to the band spectrum modulation requirement of WCDMA, each symbol of first pilot tone and second pilot tone will be had the scrambler sequence scrambling of pseudo-random characteristics, launch by the antenna of selecting again, and the symbol quantity before and after the scrambling does not change.
Choose in 4 antennas wherein that two antennas send 2 pilot tones respectively, and the cycle select different combination of antennas repeating queries with the transmission duration TTI of a data transmission block.A described data transmission block comprises an integer symbol, and also, the transmission duration TTI of a data transmission block is the integral multiple of the transmission duration of each symbol.Do not have 2 selected antennas not send pilot tone, do not send data yet.Combination of antennas can be taken from set:
{[(Ant1，Ant2)；(Ant3，Ant4)]，[(Ant1，Ant3)；(Ant2，Ant4)]，[(Ant1，Ant4)；(Ant2，Ant3)]}
Data are only launched according to the STTD mode of 3GPP Technical Specification25.214 agreement following on 2 antennas of pilot tone.For example, QPSK is that 2 bits are mapped to 1 modulation system on the symbol, and for the data of QPSK modulation, when repeating query to 2 pilot tone respectively at antenna 1 and antenna 2 time, the data bit flow emission form of antenna 1 and antenna 2 is as follows:
In the top form, each sends the QPSK symbol of 2 bit informations of carrying constantly.Wherein for antenna 1, launch b0b1 constantly first, launch b2b3 constantly second, the duration between described first moment and second moment is for sending the needed duration of symbol.Wherein for antenna 2, launch conj (b2) b3 constantly described first, launch bOconj (b1) constantly second.
Above-mentioned to follow the meaning of expression be corresponding relation, can be understood as corresponding data and launch at corresponding antenna with corresponding pilot tone.The corresponding relation of data and antenna such as Fig. 1-3, the relation of pilot tone and antenna such as Fig. 9.
Repeating query can trigger by certain mechanism, thereby decides a day line options according to the CQI value of mobile terminal reporting, for example selects the highest 2 of wherein CQI value to come a data in 4 antennas, and wherein the power of the pilot tone that receives of CQI value foundation is determined.Wherein the CQI value is proportional to channel quality, and channel quality can be calculated by channel estimation methods by the pilot signal that receives, and the CQI value has reflected quality of channel.If the CQI value is high, then current channel quality is good, otherwise bad channel quality.
The aforementioned repeating query trigger mechanism of mentioning can be: repeating query is configured to be triggered in the four antenna open loop transmit diversity patterns in base station and portable terminal, and repeating query can take a kind of order that pre-establishes to carry out.
Preferably, round robin cycle can dispose, and is the cycle such as the integral multiple with TTI, and perhaps the integral multiple with each symbol is the cycle.Because transmission data block (Transport Block) is unit transmission with TTI, user terminal can use identical pilot tone when process data block, so be that the benefit in integral multiple cycle is that the receiver design of UE can be simplified with TTI, obtain good channel and estimates.In addition, the benefit that round robin cycle is little is to obtain bigger diversity gain.
By in a TTI, selecting different combination of antennas repeating queries, form another specific embodiment of the present invention:
Adopt 1 ovsf code and first pilot frequency design to constitute first pilot tone, the quadrature pattern of this first pilot frequency design correspondence is as second pilot frequency design, and described second pilot frequency design and same ovsf code constitute second pilot tone.Two pilot tones are chosen wherein two antennas transmissions in 4 antennas, and can select different combination of antennas repeating queries in a TTI.Do not have 2 selected antennas not send pilot tone, do not send data yet.Launch scenario such as Fig. 9.Combination of antennas can be taken from set:
{[(Ant1，Ant2)；(Ant3，Ant4)]，[(Ant1，Ant3)；(Ant2，Ant4)]，[(Ant1，Ant4)；(Ant2，Ant3)]}
Data are only launched according to the STTD mode of 3GPP TechnicalSpecification 25.214 agreements following on 2 antennas of first pilot tone, second pilot tone.For example, for the data of QPSK modulation, every symbol according to [(Ant1, Ant2); (Ant3, Ant4)] the combination repeating query, then in 4 symbol times, data send form and are:
Repeating query can trigger by certain mechanism, thereby decides a day line options according to the CQI that reports, and for example selects the highest 2 of wherein CQI value to come a data in 4 antennas.
Figure 10 is the another pilot transmission mode schematic diagram of the embodiment of the invention one.
Adopt 1 pattern as pilot frequency design, constitute first pilot tone, second pilot tone respectively with the ovsf code of 2 mutually orthogonals.Two pilot tones send in two antennas choosing from 4 antennas in the repeating query mode.Wherein be the cycle to select different combination of antennas repeating queries with TTI.Do not have 2 selected antennas not send pilot tone, do not send data yet.Launch scenario such as Figure 10.Combination of antennas can be taken from set:
{[(Ant1，Ant2)；(Ant3，Ant4)]，[(Ant1，Ant3)；(Ant2，Ant4)]，[(Ant1，Ant4)；(Ant2，Ant3)]}
Data are only launched according to the STTD mode of 3GPP TechnicalSpecification 25.214 agreements following on 2 antennas of first pilot tone, second pilot tone.For example, for the data of QPSK modulation, when repeating query to first pilot tone, second pilot tone respectively in antenna 1 and antenna 2 emissions the time, the data emission form of antenna 1 and antenna 2 is as follows:
Repeating query can trigger by certain mechanism, thereby decides a day line options according to the CQI that reports, in 4 antennas, select CQI value wherein the highest 2 send pilot tone and data.
By in a TTI, selecting different combination of antennas repeating queries, form another specific embodiment of the present invention:
Adopt the ovsf code of 2 mutually orthogonals under 1 pattern respectively as first pilot tone, second pilot tone.In 4 antennas, choose wherein two antennas two pilot tones are sent as first pilot tone, second pilot tone respectively, and in a TTI, select different combination of antennas repeating queries.Do not have 2 selected antennas not send pilot tone and do not send data yet.Launch scenario such as Figure 10.Combination of antennas can be taken from set:
{[(Ant1，Ant2)；(Ant3，Ant4)]，[(Ant1，Ant3)；(Ant2，Ant4)]，[(Ant1，Ant4)；(Ant2，Ant3)]}
Data are only launched according to the STTD mode of 3GPP TechnicalSpecification 25.214 agreements following on 2 antennas of first pilot tone, second pilot tone.For example, to the data of QPSK modulation, every symbol according to [(Ant1, Ant2); (Ant3, Ant4)] the combination repeating query, then in 4 symbol times, data send form and are:
Repeating query can trigger by certain mechanism, thereby decides a day line options according to the CQI that reports, and selects the highest 2 of wherein CQI value to come pilot tone and data in 4 antennas.
Figure 11 is the pilot transmission mode schematic diagram of the embodiment of the invention two;
In Figure 11, adopt 1 ovsf code and a pattern as first pilot tone, first pilot tone is chosen wherein 1 antenna and is sent in 4 antennas, and is the cycle to select different combination of antennas repeating queries with TTI.There are not 3 selected antennas not send pilot tone.Launch scenario such as Figure 11.Combination of antennas can be taken from but be not limited to following collection:
{[Ant1，Ant2，Ant3，Ant4]，[Ant1，Ant2，Ant4，Ant3)]，[Ant1，Ant3，Ant2，Ant4]，[Ant1，Ant3，Ant4，Ant2]，[Ant1，Ant4，Ant2，Ant3]，[Ant1，Ant4，Ant3，Ant2]，[Ant2，Ant1，Ant3，Ant4]，[Ant2，Ant1，Ant4，Ant3]，[Ant2，Ant3，Ant1，Ant4]，[Ant2，Ant3，Ant4，Ant1]，[Ant2，Ant4，Ant1，Ant4]，[Ant2，Ant4，Ant3，Ant1][Ant3，Ant1，Ant2，Ant4]，[Ant3，Ant1，Ant4，Ant2]，[Ant3，Ant2，Ant1，Ant4]，[Ant3，Ant2，Ant4，Ant1]，[Ant3，Ant4，Ant1，Ant2]，[Ant3，Ant4，Ant2，Ant1][Ant4，Ant1，Ant2，Ant3]，[Ant4，Ant1，Ant3，Ant2]，[Ant4，Ant2，Ant1，Ant3]，[Ant4，Ant2，Ant3，Ant1]，[Ant4，Ant3，Ant1，Ant2]，[Ant4，Ant3，Ant2，Ant1]}
Under this radiation pattern, data are only launched at 1 antenna following first pilot tone.
Repeating query can trigger by certain mechanism, thereby decides a day line options according to the CQI value that reports, and selects the highest 1 of CQI value wherein to launch pilot tone and data in 4 antennas.
By in 1 TTI, selecting different combination of antennas repeating queries, form another specific embodiment of the present invention:
Adopt 1 ovsf code and a pattern as first pilot tone, first pilot tone is chosen wherein 1 antenna transmission in 4 antennas, and can select different combination of antennas repeating queries in 1 TTI.There are not 3 selected antennas not send pilot tone.Launch scenario such as Figure 11, combination of antennas can be taken from set:
{[Ant1，Ant2，Ant3，Ant4]，[Ant1，Ant2，Ant4，Ant3)]，[Ant1，Ant3，Ant2，Ant4]，[Ant1，Ant3，Ant4，Ant2]，[Ant1，Ant4，Ant2，Ant3]，[Ant1，Ant4，Ant3，Ant2]，[Ant2，Ant1，Ant3，Ant4]，[Ant2，Ant1，Ant4，Ant3]，[Ant2，Ant3，Ant1，Ant4]，[Ant2，Ant3，Ant4，Ant1]，[Ant2，Ant4，Ant1，Ant4]，[Ant2，Ant4，Ant3，Ant1][Ant3，Ant1，Ant2，Ant4]，[Ant3，Ant1，Ant4，Ant2]，[Ant3，Ant2，Ant1，Ant4]，[Ant3，Ant2，Ant4，Ant1]，[Ant3，Ant4，Ant1，Ant2]，[Ant3，Ant4，Ant2，Ant1][Ant4，Ant1，Ant2，Ant3]，[Ant4，Ant1，Ant3，Ant2]，[Ant4，Ant2，Ant1，Ant3]，[Ant4，Ant2，Ant3，Ant1]，[Ant4，Ant3，Ant1，Ant2]，[Ant4，Ant3，Ant2，Ant1]}
Under this radiation pattern, data are only launched at 1 antenna following first pilot tone.
Repeating query can trigger by certain mechanism, thereby decides a day line options according to the CQI value that reports, and selects the highest 1 of CQI value wherein to launch pilot tone and data in 4 antennas.
In addition, when selecting combination of antennas, also can adopt fixing combination of antennas, namely not adopt the repeating query mode, form specific embodiments of the invention five:
The round-robin order that the current base station employing is set is
[(Ant1, Ant2); (Ant3, Ant4)], [(Ant1, Ant3); (Ant2, Ant4)], [(Ant1, Ant4); (Ant2, Ant3)] }, round robin cycle is T.
The base station stops the repeating query pattern by signaling (as HS-SCCH), and the result of notice day line options.Find combination (Ant1 such as base station in one period cycle, Ant2) Dui Ying CQI value is higher than other combination of antennas, Node B will stop repeating query, select (Ant1, Ant2) as fixing antenna sending mode, and stopping repeating query by signaled UE, this moment, UE can obtain channel estimating more accurately, such as by level and smooth.
Then, the base station sends pilot tone and data by fixing combination of antennas.Adopt (Ant1, Ant2) transmission pilot tone and data such as the base station is fixing.
Be noted that, after embodiment five enters non-repeating query attitude, can get back to the repeating query state again, triggering one of mode that this state changes is: if the base station receive from the CQI value of all portable terminals less than certain thresholding, then trigger the repeating query state that enters, round-robin order can adopt default sequence, and transmission signaling (as HS-SCCH) is informed UE.
Adopt the highest combination of antennas of CQI value after in present embodiment five, entering non-repeating query attitude, improved launch mass.And still can enter the repeating query state where necessary, still can play the increase throughput, and the effect that improves the utilance of pilot resources.
Be noted that at last the repeating query emission thinking that the embodiment of the invention is mentioned is not limited only to 4 antenna transmit diversities, can also amplify 8 follow-up antennas, 16 antennas such as for 8 antennas, can adopt the mode of repeating query to select 4,2 or 1 antennas.For 1 antenna scheme, send pilot tone and data at described 1 antenna, all the other antennas do not send whatever; For the scheme of 4 antennas or 2 antennas, can adopt 4 or 2 mutually orthogonal pilot tones respectively, send the data of pilot tone and employing STTD coded system respectively at the antenna of choosing, remaining antenna does not send whatever.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. many antennas of code division multiple access open loop diversity sending method is characterized in that, described method is applicable to that code division multiple access 4 antenna open loop diversities send, and described method comprises:
Determine 2 pilot tones, wherein said 2 pilot tones are orthogonal guide frequency;
Adopt the repeating query mode, in described 4 antennas, select 2 antennas to send described 2 pilot tones, wherein 1 antenna is launched 1 pilot tone and data in selecteed described 2 antennas, and 1 antenna is launched another pilot tone and data in addition, and non-selected antenna is not launched pilot tone and data.
2. open loop diversity sending method as claimed in claim 1, it is characterized in that: the form of described data is space-time emission diversity STTD coded system.
3. as the described open loop diversity sending method of one of claim 1-2, it is characterized in that: described definite 2 pilot tones comprise:
Determine 2 pilot frequency designs and 1 spreading code, described 2 pilot frequency designs are become described 2 pilot tones through behind described 1 spreading code respectively, wherein said 2 pilot frequency designs are the quadrature pattern; Perhaps
Determine 1 pilot frequency design and 2 spreading codes, described 1 pilot frequency design is become described 2 pilot tones through behind described 2 spreading codes respectively, wherein said 2 spreading codes are orthogonal intersection.
4. as the described open loop diversity sending method of one of claim 1-2, it is characterized in that: the round robin cycle of described repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
5. as the described open loop diversity sending method of one of claim 1-3, it is characterized in that, in described 4 antennas, select 2 antennas, comprising:
According to the channel quality indicator (CQI) that reports, in described 4 antennas, select 2 the highest described 2 pilot tones of transmission of CQI value;
If exist many antennas to have the highest identical CQI value, in described many antennas, select 2 at random.
6. many antennas of code division multiple access open loop diversity sending method, it is characterized in that, described method is applicable to that code division multiple access 4 antenna open loop diversities send, described method comprises: adopt 1 pilot tone, adopt the repeating query mode to select 1 antenna to launch described pilot tone and data in 4 antennas, non-selected antenna is not launched pilot tone and data.
7. open loop diversity sending method as claimed in claim 6 is characterized in that, the round robin cycle of repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
8. as the described open loop diversity sending method of one of claim 6-7, it is characterized in that, selecting the selection foundation of 1 antenna in 4 antennas is the CQI value that reports: select 1 the highest antenna of CQI value, if exist a plurality of antennas to have the situation of the highest identical CQI value, then in described a plurality of antennas, select 1 at random.
9. CDMA base, it is characterized in that: described base station comprises 4 open loop diversity transmitting antennas, also comprises: determination module is used for determining the pilot tone of 2 quadratures; The repeating query module, described repeating query module is selected 2 antennas for employing repeating query mode at 4 antennas, and wherein 1 antenna is launched 1 pilot tone and data, and 1 antenna is launched other 1 pilot tone and data in addition; Non-selected antenna is not launched pilot tone and data.
10. base station as claimed in claim 9, it is characterized in that: the form of described data is space-time emission diversity STTD coded system.
11. as the described base station of one of claim 9-10, it is characterized in that: 2 pilot tones are determined in described base station, comprising:
Determine 2 pilot frequency designs and 1 spreading code, described 2 pilot frequency designs are become described 2 pilot tones through behind described 1 spreading code respectively, wherein said 2 pilot frequency designs are the quadrature pattern; Perhaps
Determine 1 pilot frequency design and 2 spreading codes, described 1 pilot frequency design is become described 2 pilot tones through behind described 2 spreading codes respectively, wherein said 2 spreading codes are orthogonal intersection.
12. as the described base station of one of claim 9-10, it is characterized in that: the round robin cycle of described repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
13. as the described base station of one of claim 9-12, it is characterized in that, in described 4 antennas, select 2 antennas, comprising:
According to the channel quality indicator (CQI) that reports, in described 4 antennas, select 2 the highest described 2 pilot tones of transmission of CQI value;
If exist many antennas to have the highest identical CQI value, in described many antennas, select 2 at random.
14. CDMA base, 1 pilot tone is adopted in described base station, it is characterized in that: described base station comprises 4 open loop diversity transmitting antennas and repeating query module, described repeating query module is used for adopting the repeating query mode to select 1 antenna to launch pilot tone and data at 4 antennas, and non-selected antenna is not launched pilot tone and data.
15. base station as claimed in claim 14 is characterized in that, the round robin cycle of repeating query mode be the transmission duration of each symbol in the data transmission block positive integer doubly.
16. as the described base station of one of claim 14-15, it is characterized in that, selecting the selection foundation of 1 antenna in 4 antennas is the CQI value that reports: select that the highest root antenna of CQI value, if exist a plurality of antennas to have the situation of the highest identical CQI value, then in described a plurality of antennas, select 1 at random.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210045510.1A CN103297106B (en) | 2012-02-27 | 2012-02-27 | CDMA multiple antennas open loop diversity sending method and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210045510.1A CN103297106B (en) | 2012-02-27 | 2012-02-27 | CDMA multiple antennas open loop diversity sending method and base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103297106A true CN103297106A (en) | 2013-09-11 |
| CN103297106B CN103297106B (en) | 2016-12-14 |
Family
ID=49097493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210045510.1A Active CN103297106B (en) | 2012-02-27 | 2012-02-27 | CDMA multiple antennas open loop diversity sending method and base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103297106B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10958324B2 (en) | 2019-08-05 | 2021-03-23 | Shure Acquisition Holdings, Inc. | Transmit antenna diversity wireless audio system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389029A (en) * | 2000-08-22 | 2003-01-01 | 三星电子株式会社 | Transmit diversity apparatus and method using two or more antennas |
| CN1642052A (en) * | 2003-03-25 | 2005-07-20 | 上海明波通信技术有限公司 | Multi-path searching method, device for realizing same and mobile communication terminal device |
| CN1722635A (en) * | 2004-07-12 | 2006-01-18 | 朗迅科技公司 | Method for controlling transmissions using both diversity and nondiversity transmission schemes |
| CN101635589A (en) * | 2008-07-24 | 2010-01-27 | 中兴通讯股份有限公司 | Pilot frequency processing method |
| CN102122976A (en) * | 2010-01-08 | 2011-07-13 | 上海贝尔股份有限公司 | Antenna selecting method and device for base station |
| CN102223170A (en) * | 2011-06-21 | 2011-10-19 | 东南大学 | Sequential multi-antenna selectable transmitting method for code division multi-path channel |
-
2012
- 2012-02-27 CN CN201210045510.1A patent/CN103297106B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389029A (en) * | 2000-08-22 | 2003-01-01 | 三星电子株式会社 | Transmit diversity apparatus and method using two or more antennas |
| CN1642052A (en) * | 2003-03-25 | 2005-07-20 | 上海明波通信技术有限公司 | Multi-path searching method, device for realizing same and mobile communication terminal device |
| CN1722635A (en) * | 2004-07-12 | 2006-01-18 | 朗迅科技公司 | Method for controlling transmissions using both diversity and nondiversity transmission schemes |
| CN101635589A (en) * | 2008-07-24 | 2010-01-27 | 中兴通讯股份有限公司 | Pilot frequency processing method |
| CN102122976A (en) * | 2010-01-08 | 2011-07-13 | 上海贝尔股份有限公司 | Antenna selecting method and device for base station |
| CN102223170A (en) * | 2011-06-21 | 2011-10-19 | 东南大学 | Sequential multi-antenna selectable transmitting method for code division multi-path channel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10958324B2 (en) | 2019-08-05 | 2021-03-23 | Shure Acquisition Holdings, Inc. | Transmit antenna diversity wireless audio system |
| US11303335B2 (en) | 2019-08-05 | 2022-04-12 | Shure Acquisition Holdings, Inc. | Transmit antenna diversity wireless audio system |
| US11641227B2 (en) | 2019-08-05 | 2023-05-02 | Shure Acquisition Holdings, Inc. | Transmit antenna diversity wireless audio system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103297106B (en) | 2016-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105490781B (en) | Method, user equipment and the base station of transmission control information | |
| CN111769860B (en) | CQI information receiving method, transmitting method, receiving device and transmitting device | |
| KR100640470B1 (en) | Apparatus for transferring data using transmit antenna diversity scheme in packet service communication system and method thereof | |
| KR101833829B1 (en) | Method for reporting channel status information in a multi-cell cooperative wireless communication system, and device for same | |
| CN104094655B (en) | Time-multiplexed channel status information reports in multi-aerial radio communication system | |
| CN100518007C (en) | Self-adoptive transmitting antenna diversity device and method for mobile communication system | |
| KR101946370B1 (en) | Method for reporting channel state information in wireless communication system, and apparatus therefor | |
| CN101534145B (en) | Radio base station, radio terminal and radio communication method | |
| KR20190118567A (en) | Method and apparatus for covariance matrix feedback in advanced wireless communication system | |
| CN101507139A (en) | Feedback of Precoding Control Indication (PCI) and Channel Quality Indication (CQI) in a wireless communication system | |
| CN102035584B (en) | Method for determining uplink transmission diversity mode and communication device | |
| CN105009473A (en) | Method of reporting channel state information for vertical beamforming in a multicell based wireless communication system and apparatus therefor | |
| RU2012147235A (en) | PARAMETERED CODE BOOK SETS FOR USE IN PRELIMINARY MIMO TRANSMISSIONS | |
| CN102414999A (en) | Apparatus and method for transmitting reference signal in wireless communication system | |
| CN102428658A (en) | Method and apparatus for codebook-based precoding in MIMO systems | |
| CN105144607A (en) | Method and apparatus for transmitting channel state information in wireless communication system | |
| CN105122695A (en) | Method and apparatus for transmitting channel state information in wireless communication system | |
| CN108352877A (en) | The dynamic precoding of shared reference signal | |
| CN105659509B (en) | The method and its equipment of feedback channel quality indicator in a wireless communication system | |
| CN102244564A (en) | Downlink transmission method and base station of MIMO (Multiple Input Multiple Output) system | |
| CN103238286A (en) | Feedback method and mobile terminal device | |
| CN101764632B (en) | Mapping method and device of ports and antennae in long term evolution-time division duplex (LTE-TDD) indoor distribution system | |
| CN103138821A (en) | Method, device and system for data transmission | |
| KR20130041787A (en) | Communication control method, mobile station device and base station device | |
| WO2012081843A1 (en) | Method for reporting channel status information in a multi antenna wireless communication system and device for same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |